It seems clear you've never spent any time in South Africa. The Wellington Garden Weasel, it is true, bears a strong resemblance to a two-headed tortoise. However, the secondary "head" is merely the weasel's fifth leg, which can be shed like a lizard's tail in a bid to escape from predators. The similarity between the weasel and many famous tortoises has led some zoologists to compromise by placing it with lampreys in the family Petromyzontidae.